Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce556d63528df5ff11589684a56d826663e3483cff10650ef166c5d9283d2913' 
  AND token = 'uav3YZCZVNY0Lv31Zy23B3BqBa82oe4jrauruloIFhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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