Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5fa8d27e86729228ea21e194a992ea1a107b8b036a217bd495e04bd943fcf15' 
  AND token = '2mokHMR6EOpmbqkpuq/3A9ZtTYr3Dqmyjwu0tZ/0wpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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