Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e20e89dc71e33eadc80be4220af1dd66b310c13de7fbdb03eac1fff4a3c3448f' 
  AND token = '7eEKboE+Oe8HpnSkU+fHaW7+VDI7inmRIomHnwoPaUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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