Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ea86a5e6fe49b87d65470e659ebb7864013b60008eae099e926e196d985e0b5' 
  AND token = 'lPKmfElw6C8uUwPZneBemLV3M7nUMg0fQK5+WY433Mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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