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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ec9f8acfc10916301d3c1eb5b07c437bf68833526481d60359f9c0b54c8aa7d' 
  AND token = 'i6zU3dVc1aYJ/pF5REVIZsNXV4GEalDycMOY/vq9k9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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