Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5152564b53d3292146275c8f72c59711790cc27d80bcee043a8e7a872a723a40' 
  AND token = 'c8Iz40A5mkHLkC9pngxvqt88EZf/MZA6Trjk4+lfiF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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