Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37e5b20c012fb06ce21529f5c4cf240c1efa90f6bf10c549ab6b968e1a1d1d50' 
  AND token = 'uA2qo8Z++ENuqQQYPDcfNmZBGRsQCJUyOWeRhKci4OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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