Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ab0bf051a9ffc37f017439e3011e90d313962a27b02350ea83907f5ed9adde1' 
  AND token = 'ky2C8C2wDnkXtuaayNGcmh1nkmwSJ3SDc2qSpTAGEWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}