SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6526c800d013f51225734572844ce00eb5a4b34984cc1fb87ffbc8473044eadf' 
  AND token = 'uWE75WWPV3GpwMjm0MFqY7+hl0rYHDH6xJfFnAHF3qg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00276

JSON explain

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