Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca5179994f08c22398db239b9a4b25dcfee298d37eff9d33e53d3f4d9b2bb16e' 
  AND token = 'z8EgFU8ZqydD53HBr63Ol4YWg8eE9kw6u2nvZRaDYUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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