Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66893d7fba94c7a18a62d865013d10d407effacf585cf976e790f11bb4b0b0f6' 
  AND token = 'TasFQrOfXxDOBibxhyrNSdOFw734KW+QU+BD+5tSHn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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