Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c51504b000accf69c39ae09ab472b636a611349146cb4ed0e8dd146c5fd9c9fc' 
  AND token = 'pWwa0RKWvVSm1hNTsnAuhH36YAFsYgsUY36W/Fyvskw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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