Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '326ed1033b6e00a8b8fc51694923ec936989656ae4b66b49ae1c09f9869946d4' 
  AND token = 'DIEXLDhOCkNz30HvonM9vA+iSP31Ys5LYPkuXsaPPIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}