Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fb772c70767ca55584ecbfe06a25a33b0a74a1c45b82bd90cee7d913a730f91' 
  AND token = '+Iz4EFpcxNDfbwDMAq+xOdEBhFEtTaeo40pHjclmKYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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