Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b15e80919ea531cf4af0ef30e83d861c8afcdeb2d0a605ed2363d9c8dc5c3f' 
  AND token = 'eXpBqF/RUMdT3b7cI6Jfz2x4saj4Nhy1j9MwPE349fA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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