Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba15f71070b2a3115a7cb22a18e11db004449a817091d14af6c44894863fff47' 
  AND token = 'QDH3AHnMjx4csv7n9Fmfu7B3b8LrhWmYW8HaqY6r0v4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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