Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '264c292ee167ac9a9009718a0b8ccf3fac45fa2a75ef952e3c28a4e16b614530' 
  AND token = 'r8T1Am2fhsqpcqb6dwNM8YAMJcYGGYT8Eh/PMBkdxvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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