Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0d35d0c849f8b2556c3f2fe56ca958d189368f249d3658eeb08964d4b6452a8' 
  AND token = 'JTlCCkwTAvf0Xag4QdI5VjendMJB+wd3iJMIy80eQz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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