Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '45ccbfebb086cc905dd5ea600ea71db50a6c7a0cc0bbe2928966e94aaf7138fb' 
  AND token = 'Pvp93gwfkwoHXg32UA3E5INB05hu6uBOzYiwU3EiErU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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