Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc5517f87ac1239eb0a49415258da6421e5df85109d5fc4e239a1f90ddb8c16' 
  AND token = 'oy5acYxvf4tRRwtn2sQErCu5o14Yv3o6mz74ZbzhUGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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