Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb71eaef267725e5e9115cc0f6eb470e04920bddc93f0e15849d791d9a79966' 
  AND token = 'ZTTi4Izy2mFx63lQJ7vw7eQUvzpI8yYNCSKHypt3QBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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