Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fa4d6100dd4f1968764f9ca33618d1b4e3837c285fcaac53416e77b4cb85029' 
  AND token = 'nTS87/QGt/TKrKYZyfPqIoTkIKlrubY33005CjcftRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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