Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8bfcdb2c6065ce32a3a6af068e23cdc8a8aa535c15bc0388b8a40482c97561ed' 
  AND token = 'NwkKZNYMDv+kOyy0fN8yb9oyesmrkWI7uGnjzlv2NKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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