Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '151cb45cac65c148fc4982f7d7f07fdc1b8911eab1108ed4d2e51d36017eeb48' 
  AND token = '14L299EEr2Z7+mdMACzif1mY72Lh9ZwoUWVRXKhMG9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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