Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16a7d999a755249d43d800e578cb6a12016891a048e78847f54e1c4bf1116844' 
  AND token = 'Or78d6XlBwUXayraFqD5QYDcMWwKt3SVon0noTpjyqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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