Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adf466402b15c74b00b325894bc4e4bd428914175745d9f26889e6b20aba5089' 
  AND token = 'QhRD0KFndKzG/iXUI6HTOPXIvR60bzho7d65xWRv35c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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