SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0d7037266375d4933dc23693dc0585f341ba0fe42253359ea76eefd1459c421' 
  AND token = 'WK8+bueHJY/ZY+2t8WI4hvyZmNukFWi//U37WWggGlc=' 
  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"
    }
  }
}