SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba8afb02106fff8a8f3f176efbd7723255a717e9d3433e76380a4742cdc662a5' 
  AND token = 'dLmD6Q99G2sL8BcsXHgIkY4/w4tKV36ZVxEFMCXRU5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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