Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa301991cbf732f03e1f6bdd2b3216cad3bb36b8352fa425233990496e1ef051' 
  AND token = '9rQSjj567QK4FELtGqiXg4dfJEoWUaTnvpcbMgxSwHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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