Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '042fe37002d539c23c7f0ba61a7ed683d4359266b65c0afdcc9a9fbd229f1e53' 
  AND token = 'Gyk6T9A4afuOVbe/WcvC2C7egMz7TbvDuAk6QqiQKPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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