Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '062b5d427599adecd0dfa6ef053fc6a7fda52870ea0c08afb1f69d79e2ccfddb' 
  AND token = 'JaSnofV1oMc7J4m5Yf2dDq4gNOLFhxMFvxjoOHgCJNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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