Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe453f5c7835735cd88bb671a383030dcb9080ed43007164703e5560c352e464' 
  AND token = 'p9TCOvddnDvVeapA1JJasvYJWgmEzgc8ro/7XRPJZJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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