Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec1f3d2d9944a448fae02eee871f79bac196b04e305f40ab74a9aaabb8c011c9' 
  AND token = 'vPkSxkYQIILhYviQEJsXmnYZkPVjmaPVTITMurkrfe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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