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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1152ac0bf06064261dafb5b431594e9d529458f37f0e26f5e843e758324684e' 
  AND token = 'ypZYDNdR/gQ8fG/7QNGlZKNaTx69yS2WuEb6C1+5zmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}