SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7682f34bd9d791678a0d2806a81b7f47727455187f495ad7585fa9df1854960' 
  AND token = 'XI0XgtvLHz4AqXs1dMgP9Ch/+DILE0zGOoV/okxyNYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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