Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc73e66c574b749f9e33ac338bc9b8bad8f595999ed0ce2d36b48b6b896f36ec' 
  AND token = 'xy84Dk4VEO8C7yclOK7wY6KaM/V8mJa/ZdGyC2fsPi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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