Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '782de0e026029766399e2901c323dd0f2d0babe08a59ff49a3a14d7fe0147195' 
  AND token = 'm2JD5RpYd6OenPnwCgN49oPv7HwjpFZJ9aY23fXDYWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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