Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ece9ec87caebcbc48e8625aeec523cd8769565651a56d965edcd048e85e7753' 
  AND token = 'MBb4sHTgK16Q0lb8VZShtLMtFPF4ktUc0x8D0fonChE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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