Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a8e5d7123c47ce91dadfed30a78737329c84153156ce61ba2546429a30b6017' 
  AND token = 'e3NdpTOFS8EJercfuAqCsf/y4bEQPpwR6GcxzdJnbBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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