Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cb24d3674a21d05ff3320e34d331b66b8ca87f4599c984b18aa6f979cde582b' 
  AND token = '0IXh4P6symeJm6ZbmBeJpZoRWyGpa0vJ4yaQjfJJvmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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