Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5954ed58301d4040cb22569a404d172fe4672259b05c1bbaa1c5042f61666998' 
  AND token = 'YlN17MjUGpPepXJmuMPxapx2wcDT0b8SyWhetjypq9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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