Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57afc113367e0e93163df02b605419c0632864441eccf4240a68ecc457800389' 
  AND token = '0tpmEUXc2LClbZgdHQbdDntCLVpbrCjny76k92vMFJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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