Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '016727be1539c642bd060f3dcd491dff70af8116219b06b0168a063ec8c92ef7' 
  AND token = 'tgRfFvuE7BZlheOHliV+ScWifWgzPHXKiLNa6UC7lYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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