Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e25f63d4ee4191368336df09513ce1a03058c256a7071456ae471e0868f7212' 
  AND token = 'EQHENoJwT9FxHxj3Vau6kXCefnK4iWYfFxmjRUqSCbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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