Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e9f831ec7092e91086dfa9b43698e8156c585269c9cfa68447a61ae9de84bce' 
  AND token = 'TWdgyjRrSDyBjEbQOyySCtClJliRCKx3BCDD8o7HxYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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