Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ca2980eb7a23d97f0d9bc678e21b4702f9acdea0b014bd1463cb00553f34b84' 
  AND token = 'B49xqmQfQTQr3SELfvtEQt8ey6I2G0UaoiVEMzylDAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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