Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3f70e3385c2aac8b7ca9c69fa47b2d4b6a300553ac39723809f34679eddef2e' 
  AND token = 'ouFZwPdJqOWMehwwtfclNa5DsGAAfhXXKWhGxHlAx20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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