Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dbc643aa4502227b5b0e7f7430dd6733bb90688956766ff57225bc3d3958abb' 
  AND token = 'qk9Mii+TmAqUeOVAmnCIO09XsLDN65hxhonTmklpYUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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