SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8afd10bfa6c5c41f0a5ccbe06ec8f82298dbe59744b267a4d523461b54ef284' 
  AND token = 'bNfvfWKwlk7hbBUBxqVPGo7lPWvti5UgZpnawg+LbgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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