Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9801de7c0cf2a3e1e3e4ec11f82dff604e777407365a05a1ef992bb988fd1e68' 
  AND token = 'sLnTwMTWuNKBJokQZKQM7GW7atYWT1ShXTLhXv28GLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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