Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf026bca62347135d008d9a490f73e4d950ac4067b578c2174dec8239863e0ea' 
  AND token = '19lmBp7kUV6GCSTg4ZHvyCklOHkUGXi5NEb4YoaRoFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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