Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '873e845a25c5309d38f7684ca90b0e9cb58304c2a2b2200fcb8ce508a08d1502' 
  AND token = 'yjE+4h8zTsVG1qNUrfQ87Io7CAETLG9dxlYKCOkLWFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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