Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0be85909252d6e8fcbf2f17781c8522a05fe0402031c0dac28656ae15047062' 
  AND token = 'XvnQA9HibyFQHhr8OJXqxa5b5v8yABj71vSsUMWueK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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