Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efd23a4ecf95643936853ee388ad5bec4d0811e85e19d7e0a9bd45a2cfefc2ee' 
  AND token = 'W+tqI31nr0ECNimvOFviuB/g1Y1rfQEax82vIoDVRBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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