Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ec04ff0b0bdd52645e49c2ceabe14c76a104de2365e40fe5724faf16900894d' 
  AND token = 'gDPQeqKx3rvXopZEp32V0B6Oa/MqDQZjyOTP3393CfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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