Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a42213fbbf6d6037b4d76b05b900ad79f4aebb0f7be89f2ea937fc4ae468f60e' 
  AND token = 'iBuNl0+jOvZpn/TnPfu/umFL/Zdx/sQwLkJZjW6BXb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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