Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c0687b587075eb032f378e156d1db6379282f15135b61b59bbfdd2eeacfd92b6' 
  AND token = 'jgriGksSA5TOMsaaTXZYGvXI+LvB2ZW3e2hWZ+3EM2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}