Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4493acb8170faeae098232febaa8da8a40337995599aaf01593bc83b14c82889' 
  AND token = 'sBn0x4vFKH2+VWshiepHk2Fs04tCT07jpMPjomRMchU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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