Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51efa850467c2e9c8a4a4ff530546afceaf8097ec843bd26bd28b00b87ed4695' 
  AND token = 'fS22Nq7KrUWv7jfplTv4wWd3KNVEinpWVUxf9kmf6sQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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