Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddef1834a8fad05a36b9c40afe9bbaea8c2b52f1ce14bc53a5ef643fb39108b0' 
  AND token = 'Rp3KHPXA0pXQnYJogtMR3ZOdlEUGJiglF+fFFtNvqwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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