Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f6b145abd6ca4a77c30417097240edbcfab4e2d7a6b503077bb88e3a131d41e' 
  AND token = '0DctDVjWSN5RiX8gbx/McPBbq0utFwle0ePd2kZqXLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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