Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efd7d9847b895c0db89693652203f9c52759f57ae0294478a35378113acb365d' 
  AND token = 'Ko8M11Km4eajAFkz1ECdBORKezXSbQWrICJUYSrP0dM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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