Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd00396462cd39abf75f90b0f7945099574638ad6096efa33dba9276ca7e40c41' 
  AND token = '53hb6DwIaIajCjTWgkaqwWxHMrkZrWnRlscND8UTnX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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