Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1850ed3e97b1dbd68a0cf88adb6fbd1b267e32b82693efc138efca21fc01bd3e' 
  AND token = 'BTeuCQRHswNLwBa6fs24Dbj5QTUljmSsbrUWjcH5e/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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