Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69743fc106c0a21778e0637038e289b5c83b39e76a15b1a48153e1cf8d83941d' 
  AND token = 'St/VJdTTlBOSrrSRPFO4694IoEZH08oszcVa5fxYMm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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