Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e59c2b3ffee1601c806dbe02f29382f0301f44bbd2351b2376bec54e654ddc6a' 
  AND token = '9SCfMExRuyoCMBjS5A2ddoRp75+BPOz4bJFwIbEzwVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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