Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db9820a51793793db57fe265d6cf1e562e46bf36976190ee2aabc37f8e3cdea7' 
  AND token = 'yVFcnp6BOeJ3ocC6N4aF0Evo/ZrZIHSMmca/oSvQFVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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