Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '262aab18907093214eb6ac6cd98db2185252761a2e280487650c4b7e031ffc81' 
  AND token = 'nwmhHS3G0blngZsMeaVkMRx686KIusX3b1BhXYYpw6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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