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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcb233dbe1a0f13f5da933cb9537489a70d1a25c22b8d35c98cabf75cea58a0e' 
  AND token = 'VIfWwpYHbR/pkPpj90zTp09UNeIZMWTHby2jTzpMZfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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